Blank-holder for punch-cutting and like machines.



F. H. PIERPONT'. BLANK HOLDER FOR PUNCH CUTTING AND LIKE MACHINES.

APPLICATION rum: mm: 16, me. RENEWED 1mm 10, 1909.

938,435. Patented 0ct.26, 1909.

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F. H. PIERPONT.

BLANK HOLDER r011 PUNCH CUTTING AND LIKE MACHINES.

APPLIOATION FILED JUNE 16, 1908. RENEWED JUNE 10, 1909.

938,435. Patented Oct. 26, 1909. v

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FRANK HINMAN PIERPONT, OF HORLEY, ENGLAND, ASSIGNOR TO LANSTON MONOTYPEMACHINE COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION OFVIRGINIA.

BLANK-HOLDER FOR PUNCH-CUTTING AND LIKE MACHINES.

Serial No. 438,833.

To all whom it may concern:

Be it known that I, FRANK HINMAN PIER- FONT, a citizen of the UnitedStates, temporarily residing at Horley, county of Surrey, England, haveinvented certain new and useful Improvements in Blank-Holders forPunch-Cutting and Like Machines; and I do hereby declare the followingto be a full, clear, and exact description of the same, reference beinghad to the accompanying drawings, forming a part of this specification,and to the figures of reference marked thereon.

This invention relates to blank holding and gaging means for punchcutting and like machines such as that disclosed in application SerialNo. 326,571, filed July 17, 1906, of which this application is adivision.

As is well known the accurate reproduction of pattern forms is a mostdifiicult and delicate operation more especially so in the manufactureof type punches where the pattern merely represents the face and it isrequired not only that the face shall be accurately reproduced and thesides of the character properly shaped, but, also, that the face shalloccupy a predetermined position or be justified relative to the body. Inpractice it has heretofore been customary to justify the character afterit is cut by dressing off the sides, an operation involving the use ofspecial tools, the consumption of much time, and the exercise of a highdegree of skill.

One object of the present invention is to enable the character to beproperly located or justified while being formed, to which end itconsists in the improved means hereinafter fully described for gagingthe position of the blank in the punch cutting machine, and forfacilitating the insertion and removal of the blanks for substitution,inspection, etc.

In the accompanying drawings, illustrat ing a preferred form ofembodiment of the invention: Figure 1 is a vertical section of a portionof the movable head or support and thecutting'tool of a punch cuttingmachine with the holder applied in position.

Specification of Letters Patent.

Original application filed July 17, 1906, Serial No. 326,571.

Patented Oct. 26, 1909.

Divided and this application filed June 16, 1908,

Renewed June 10, 1909. Serial No. 501,435.

Fig. 2 is a side elevation, and Fig. 3 is a horizontal section of theholder and its support. Fig. 4 is a view in perspective of the holderdetached.

The same numerals designate like parts in the several figures.

Although equally well adapted for use in connection with a fixedsupport, for example that carrying the rotary cutter 1, the holder 2 isshown applied to the movable head or plate 3, the latter connected tothe pantograph cooperating with the pattern after the manner disclosedin the before mentioned application. The supporting head 3 is formed orprovided with an undercut or dovetail slide way i the bottom 5 whereofpreferably lies in a plane parallel with the motion of said support. Oneof the side walls 6 of said way is inclined inwardly at an acute angleto the bottom 5 while the opposite wall 7 is preferably perpendicular.At or near one end of the way 1 is located a stud or gage 8 and in thewall 7 is mounted a bolt 9 positioned obliquely toward the rear end ofway 4 at an angle to its bottom 5, said bolt forming an easy working fitin a hole in side wall 7. The outer end of bolt 9 contacts with a fiatspring 10 fixed to the support in position to be engaged by a cross pinor roller 11 carried by a lever 12, said cross pin or roller contactingwith the spring at a point intermediate the latters attachment to thesupport and the bolt 9. A pivoted rev taining latch 13 is arranged toengage lever 12 when moved to advance bolt 9.

The holder 2 is equipped with a dovetail portion 14 adapted to fit andslide in way 4 and with a socket or recess 15, preferably rectangula-rin cross section, extending through the holder and closed or partiallyclosed at one end by a steel block 16 held in place by screws 17, saidblock forming a seat or gage for the end of the blank. Two adjacentsides of the blank are shaped to correspond with one angle of the socketand it is firmly held in said angle by a pin 19 the latter engaged by ascrew 20.

In one side of the dovetail portion 1 1 is formed a recess or seat 21for the reception of the point of bolt 9, and, preferably, the holder isequipped with a linger piece or handle 22 to aid in manipulating thesame.

Operation: The holder 2 being withdrawn from its support the blank isinserted and screw 20 turned to clamp the blank. The position of theblank with relation to the holder is thus gaged and fixed by its contactwith adjacent sides of socket 15 and end gage 16. Lever 12 being swungdown and bolt 9 retracted the holder is inserted in way 4 and advanceduntil it contacts with gaging stud 8, whereupon lever 12 is elevated toengage spring 10 and through the latter advance bolt 9 into seat 21.Owing to the diagonal arrangement of bolt 9 it operates to press theholder simultaneously against the three fixed gaging surfaces formed bythe bottom .5, inclined side wall 6 and stud 8, said inclined wallaiding in this movement by directing the holder against the bottom ofthe way. By employing a spring (10) to actuate the clamping bolt 9 apractically uniform degree of pressure is obtained and not alone is themutilation of the gaging and holding surfaces prevented but alsodistortions incident to excessive pressure. hen it is desired to removethe holder either for the insertion of a new blank or for inspecting thework, the operator merely lifts the retaining latch with one finger andslides the holder out, both of which operations can be performed by onehand.

Having thus described my invention, what I claim as new, and desire tosecure by Letters-Patent, is:

1. A device for positioning and holding blanks including in combination,a holder and support provided with three sets of gaging surfaces intriangular relation, and a spring actuated clamping member operating indiagonal relation to said gaging surfaces to simultaneously thrust theholder against the several gaging surfaces carried by the support.

2. A work holder for punch cutting and like machines including thefollowing elements, in combination, to wit: a support provided withthree fixed gaging surfaces;

a holder provided with gaging surfaces complemental to those of thesupport and a spring actuated bolt mounted upon the support in diagonalrelation to said gaging surfaces and operating to simultaneously thrustand retain the holder in contact with said fixed gaging surfaces.

3. In a work holder for punch cutting and like machines and incombination with a support provided with three gaging surfaces intriangular relation, a blank holder adapted to engage and be positionedby said gaging surfaces, and a pressure device operating upon saidholder in a direction diagonal to said several gaging surfaces.

at. In a work holder for punch cutting and like machines the combinationof a blank holder provided with a socket for the reception of the blankand with three gagmg surfaces in triangular relation, one ofa springcoupled with said clamping bolt to advance the latter and means forputting said spring under tension to advance the bolt.

5. A blank holder for punch cutting and like machines comprising thefollowing elements, in combination, to wit; a support provided with aslideway for the reception of a removable holder, one wall of saidslideway inclined inward fronr the bottom; a gage located at or near oneend of said slideway a blank holder provided with gaging surfacescomplemental to the bottom, side walland gage of said slideway and aclamping bolt mounted upon the sup port and engaging a seat in the workholder.

6. A blank holder for punch cutting and like machines including thefollowing elements, in combination, to wit; a support provided with aslideway one of whose side.

walls is inclined at an acute angle to the bottom; a blank holder fittedto and movable longitudinally of said slideway; a gage on the supportfor limiting the advance of the holder in the slideway; a clamping boltmounted upon the support and adapted to engage a seat on the holder,said bolt being movable in a path diagonal to the bottom and inclinedside wall of said way, to simultaneously force the holder into contactwith said bottom side wall and gaging member; a spring coupled with saidbolt; and an actuating lever engaging said spring to ad vance the bolt.

7. A blank holder for punch cutting and like machines including thefollowing elements in combination, to wit; a support provided with aslideway one of whose side walls is inclined to an acute angle at thebottom; a blank holder fitted to and movable longitudinally of saidslideway; a gage on the support for limiting the advance of the holder;a clamping bolt mounted on the support and adapted to enter a seat onthe holder, said bolt being movable longitudinally in a path diagonal tothe bottom and side wall of said slideway and inclined to the directionof motion of the holder therein; a spring coupled with said bolt; alever engagin the spring; and a retaining catch for the lever.

8. A blank holder for punch cutting and like machines including thefollowing elements, in combination, to wit; a support provided With aslidevvay one Wall whereof gaging the holder and operating to simul- 10is inclined at an acute angle to the bottom; taneously press the latterinto contact with a blank holder fitted to and movable in the gagingmember and the bottom and insaid slide Way and provided With a blankclined Wall of the slideway.

receiving socket, the latter provided with FRANK HINMAN PIERPONT an endgage, a gaging angle and a clamping device; a gaging member on the sup-WVitnesses:

port for limiting the advance of the holder H. D. JAMESON,

in the slideway; and a yielding clamp en- F. L. BANDS.

